Shift to Park error message when car is already in park and then difficulty getting car to turn off. This is an ongoing issue. I have seen online this is a common problem. This is a safety issue because if the car doesn't turn off the battery will go dead leaving a driver stranded. This issue began soon after the car was out of warranty.

Source: NHTSA complaint ODI #11764771 · view all complaints for this vehicle at nhtsa.gov

The Onstar module has went out on my car and while researching the issue I found out that it is a very common problem with Chevrolet/GM vehicles years 2021-2025 and although Chevrolet and GM are wwll aware that there's an issue and that the onstar modules are faulty there's been no recall. Mind you the module doesn't just affect onstar features it also is connected to bluetooth microphone and remote start and now none of them work at all.

Source: NHTSA complaint ODI #11724012 · view all complaints for this vehicle at nhtsa.gov

The contact owns a 2023 Chevrolet Trailblazer. The contact stated that while his wife was driving at an undisclosed speed, the brake pedal felt extremely firm and was difficult to depress. The contact stated that his wife needed to anticipate the stopping distance to apply enough force to the brake pedal while stopping the vehicle. The vehicle was taken to the dealer on several occasions, but the technicians continuously stated that there was no failure with the vehicle. The vehicle was taken to an independent mechanic and was diagnosed with an inoperable brake master cylinder. The contact was informed that the brake master cylinder needed to be replaced. The vehicle was taken back to the dealer with the information; however, the dealer stated that the brake master cylinder replacement was not necessary. The vehicle remained unrepaired. The manufacturer was notified of the failure. The failure mileage was 40,000.

Source: NHTSA complaint ODI #11759244 · view all complaints for this vehicle at nhtsa.gov

Steering warning light comes on while driving and steering locks up. Dealer inspected the vehicle and states the steering unit did pull a code, however is not serviceable and will need replaced. I do not feel safe driving the vehicle as the steering locks up and cause a serious accident. The dealer advised it may take several weeks for the parts to arrive. I am reading other reports of Trailblazer owners facing the same service issue. I am requesting a rental car from GM and/or the dealer until my car is fixed, however they told me I have to pay out of pocket myself. I am disgusted this brand new car is facing such a serious safety issue. This needs investigated ASAP before someone is killed on the highway.

Source: NHTSA complaint ODI #11546307 · view all complaints for this vehicle at nhtsa.gov

While driving on the highway in light traffic at approximately 70 mph and changing lanes, the side airbags in my vehicle suddenly deployed without warning. There was no collision, no contact with another vehicle, no road debris, and no apparent external cause for deployment. I did not strike anything before, during, or after the deployment. There were no vehicles within several car lengths of my vehicle at the time. Highway Patrol was dispatched to the scene. Officer TJ Carter with Guilford County responded. Upon inspection of the vehicle at the scene, we found no evidence of impact or contact with another vehicle, object, or debris. The vehicle was covered in yellow pollen at the time, and even light contact would have left visible marks or disturbance in the pollen. After examining the vehicle, no signs of contact were identified. The vehicle does have unrelated prior body damage from over a year ago on one side, but that damage predates this incident and was not caused by this event. The responding officer can confirm there was no collision or new impact associated with the airbag deployment. There was no accident associated with this airbag deployment. The airbags deployed while I was traveling at highway speed, which caused a sudden and dangerous driving event and required me to quickly maneuver to the side of the roadway. This created a serious safety risk to me and to surrounding traffic. Prior to this incident, there were no warning lights, safety alerts, or service notifications indicating an issue with the airbag system or vehicle safety systems. However, a notification did appear in the My Chevrolet app at or around the time of the incident. The vehicle has not yet been fully inspected following the incident. A safety claim has been submitted to General Motors. I also have video footage of the Highway Patrol Officer cutting down the airbags on-site but cannot add that below so I have added a screenshot.

Source: NHTSA complaint ODI #11727596 · view all complaints for this vehicle at nhtsa.gov

The sunroof fabric roll came off of the track when attempting to open the sunroof. Yes it is still off the track I have yet to get it fixed due to time restraints. It poses a risk because of the loud noise it makes until you stop the opening of the sunroof. As many individuals open their sunroof while driving it poses a risk of being a major distraction if and when this happens. I have not taken it to get repaired yet but I did report it to the customer service via the my Chevrolet app. It did not give off any warnings or lights prior to the failure .. it was a sudden failure that shocked me when it occurred as I couldn’t figure out how to stop it to begin with

Source: NHTSA complaint ODI #11651065 · view all complaints for this vehicle at nhtsa.gov

While driving to work last Thursday morning suddenly my 2023 Trailblazer let out a sorta growl and then a dragging noise thankfully I was able to get over and stop on the shoulder only to discover that my tail pipe was dragging from just after the catalytic converter as the bolts apparently sheared off leaving only the head of the bolts intact. Lucky for me I there wasn’t major damage. I did however have to get my vehicle towed and have the bolt heads cut off in order to have the exhaust fixed

Source: NHTSA complaint ODI #11760189 · view all complaints for this vehicle at nhtsa.gov